How do the Sun's luminosity and apparent brightness compare with those of other stars?
A. The Sun's luminosity is below average, and it has the least
apparent brightness.
B. The Sun's luminosity is average, and it has the least apparent
brightness.
C. The Sun's luminosity is above average, and it has the greatest
apparent brightness.
D. The Sun's luminosity is average, and it has the greatest apparent
brightness.
SUBMIT

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

answer; talc and gypsum;

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101